:root {
  --brand-color: #0052D9;
  --brand-color-hover: #0594FA;
  --text-primary: #181818;
  --text-secondary: #666666;
  --bg-primary: #ffffff;
  --bg-secondary: #f5f7fa;
  
  font-family: PingFang SC, Microsoft YaHei, system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light;
  color: var(--text-primary);
  background-color: var(--bg-primary);

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  font-weight: 500;
  color: var(--brand-color);
  text-decoration: inherit;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--brand-color-hover);
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
}

h1 {
  font-size: 3.2em;
  line-height: 1.1;
}

button {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  background-color: var(--brand-color);
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
}

button:hover {
  background-color: var(--brand-color-hover);
}

button:focus,
button:focus-visible {
  outline: 4px auto -webkit-focus-ring-color;
}

.card {
  padding: 2em;
  border-radius: 8px;
  background: var(--bg-primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

#app {
  width: 100%;
  margin: 0 auto;
}

/* Animation classes */
.fade-enter-active,
.fade-leave-active {
  transition: opacity 0.3s ease;
}

.fade-enter-from,
.fade-leave-to {
  opacity: 0;
}

.slide-up-enter-active,
.slide-up-leave-active {
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.slide-up-enter-from,
.slide-up-leave-to {
  transform: translateY(20px);
  opacity: 0;
}

/* Responsive utilities */
@media (max-width: 768px) {
  .hide-mobile {
    display: none !important;
  }
}

@media (min-width: 769px) {
  .hide-desktop {
    display: none !important;
  }
}
</style>